Tetrazane

The heat of formation of N4H6 was estimated by a semiempirical relation to be 342 kJ/mol at 298 K. A stabilization energy of - 27.6 kJ/mol is indicative of a thermodynamically unstable molecule. It was predicted to be stable towards dissocation into H2NNH radicals [4]. A limited number of completely substituted tetrazanes is known see [5] for a review. 

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N4H6 tetrazane, H2NN(H)N(H)NH2, (bright yellow solid)... 

Dissociation of 1,1,4,4-tetrapheny 1-2,3- dibenzoyl-tetrazane into radicals in chloroform, acetone, ether, and toluene.464 90s... 

Mention should also he made of radicles with bivalent nitrogen which are derived from hydrazines, the so-called hydrazyls. They are deeply coloured compounds which are obtained by dehydrogenation of tertiary hydrazines and form equilibrium mixtures with colourless tetrazanes, which dissociate into these free radicles (S. Goldschmidt),... 

Buzane, see Tetrazane, tetrazene, and tetraza-diene complexes... 

Saturated Hydronitrogens (Type formula NnHn+2)- Ammonia NH3 Hydrazine (diamide) H2N.NH2 Triazane (prozane) H2 N.NH.NH2 Tetrazane(buzane, hydrotetrazane) H2N.NH.NH. NH2. Ammonia and Hydrazine are known in the free state the Triazanes are rather poorly defined as a class, whereas Tetrazanes exhibit a tendency towards instability by undergoing dissociation in solution to yield hydrazyl radicals... 

N0)H2C.N(N02).CH2.N(N02).CH2.N(N02). -CH3.N(NO2).CH2(0NO2) mw 434.21, N 32.26%, OB to C02 minus 3 7% solid, mp 201° (on rapid heating), bp — expl at higher temp. It can he prepd either by nitration of 1,9-Diacetoxy-pentamethylene-2,4,6,8-tetranitr amine (Code name AcAi) (described in this Vol as 1,9-Diace toxy-2,4,6,8-tetranitro-2,4,6,8-tetrazan one) or by nitration of 2,6-Dinitro(b cyclo)-l, 3,5,7,9-pentamethylene-2,4,6,8-tetramine (Code name DPT) also called 3,7-Dinitro-l,5-endomethylene-... 

Also with DIB and nitrosobenzene A-phthalimidylamine gave the corresponding azoxy compound, whereas DIB alone converted it in a unique way into a tetrazane further oxidation led to the frans-tetrazene [63] ... 

Cyclo-3,6-disila-i,2,4,5-tetrazanes are six-membered rings containing two N—N bonds. In 1958, Wannagat et al.55 reported the synthesis of a cyclodisilyltetrazane in the reaction of hydrazine with diphenyldichloro-silane [Eq. (35)]. 

As shown in Scheme 3, the synthesis of a cyclo-l,3,5-trisila-2,4,6,7-tetrazane was accomplished by the coupling of a 1,3-dichlorosilane with a dilithium 1,2-hydrazine,63 64 whereas in the analogous reaction with pure hydrazine only the equivalent six-membered ring is obtained.64... 

Organic derivatives of tetrazane ( buzane ) H2N—NH—NH—NH2 have been known since 1893 (227), but to date no transition metal tetrazane complexes have been fully characterized. However, iron tetrazane species have been proposed as intermediates in the iron(II)-catalyzed aerobic oxidation of hydrazines (104,230) and are thought to account for the red coloration observed in some of these reactions (230). 

Tetrazane complexes may form as unstable intermediates during the transition metal catalyzed oxidation of hydrazines. Tetrazene adducts are... 

The hydrazyl radicals either dimerize to form tetrazane, which then decomposes to form dinitrogen and ammonia (62), or are oxidized further to diazene, which disproportionates to dinitrogen and hydrazine, thus yielding (64). 

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